MR imaging of the patient at follow-up 3 weeks later. DWI remains the same, without any signal alteration (A). On the Axial T2 FRFSE image, we can see substantial regression of the previous lesions and no new lesions (B). The Axial T2 FLAIR image shows that the fourth ventricle has returned to its normal size. All signal intensities are normalized (C). On the T1W Axial FLAIR there is no enhancement of cerebral vessels after contrast medium was administered, as described above (D).